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Avionics system integration for the MH-53J helicopter MH-53J直升机的航空电子系统集成
9th IEEE/AIAA/NASA Conference on Digital Avionics Systems Pub Date : 1990-10-15 DOI: 10.1109/DASC.1990.111264
S. Felter, D. Hill, C.A. Smith
{"title":"Avionics system integration for the MH-53J helicopter","authors":"S. Felter, D. Hill, C.A. Smith","doi":"10.1109/DASC.1990.111264","DOIUrl":"https://doi.org/10.1109/DASC.1990.111264","url":null,"abstract":"The functions developed for the MH-53J helicopter are described, following a brief introduction of the Pave Low III system. In addition, other functions typically found in mission computers, but not in the MH-53J, are discussed. Future concepts for mission computer application are discussed. It is pointed out that the mission computer of a typical airborne platform transforms a group of independent avionic equipment into an integrated system. A centralized display system provides a common operator interface for all equipment, easing operation of the system and decluttering the instrument panel. Customized functions may be installed as required for a particular aircraft, allowing standardization of the other avionic equipment. As research progresses, the capabilities provided by the mission computer will continue to ease pilot workload and enhance the effectiveness of the avionic suite.<<ETX>>","PeriodicalId":141205,"journal":{"name":"9th IEEE/AIAA/NASA Conference on Digital Avionics Systems","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132068985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fault characterization of a multilayered perceptron network 多层感知器网络的故障表征
9th IEEE/AIAA/NASA Conference on Digital Avionics Systems Pub Date : 1990-10-15 DOI: 10.1109/DASC.1990.111341
C. Tan, R. K. Iyer
{"title":"Fault characterization of a multilayered perceptron network","authors":"C. Tan, R. K. Iyer","doi":"10.1109/DASC.1990.111341","DOIUrl":"https://doi.org/10.1109/DASC.1990.111341","url":null,"abstract":"The results of a set of simulation experiments conducted to quantify the effects of faults in a classification network implemented as a three-layered perceptron model are reported. The percentage of vectors misclassified by the classification network, the time taken for the network to stabilize, and the output values are measured. The results show that both transient and permanent faults have a significant impact on the performance of the network. Transient faults are also found to cause the network to be increasingly unstable as the duration of a transient is increased. The average percentage of the vectors misclassified is about 25%; after relearning, this is reduced to 10%. The impact of link faults is relatively insignificant in comparison with node faults (1% versus 19% misclassified after relearning). A study of the impact of hardware redundancy shows a linear increase in misclassifications with increasing hardware size.<<ETX>>","PeriodicalId":141205,"journal":{"name":"9th IEEE/AIAA/NASA Conference on Digital Avionics Systems","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131401575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Modeling the effect of pressure altimetry on geostationary satellite surveillance accuracy 压力测高对静止卫星监视精度影响的模拟
9th IEEE/AIAA/NASA Conference on Digital Avionics Systems Pub Date : 1990-10-15 DOI: 10.1109/DASC.1990.111259
S.C. Mohleji, C. Shively
{"title":"Modeling the effect of pressure altimetry on geostationary satellite surveillance accuracy","authors":"S.C. Mohleji, C. Shively","doi":"10.1109/DASC.1990.111259","DOIUrl":"https://doi.org/10.1109/DASC.1990.111259","url":null,"abstract":"In the ranging and processing mobile-satellite (RAPSAT) system, aircraft position is estimated from the aircraft altitude in conjunction with the aircraft range (signal transit time) to two surveillance satellites. Due to large variations in atmospheric conditions, altimeter readings deviate significantly from the true geometric altitudes. As a result, the aircraft position estimation accuracy of satellite surveillance systems, such as RAPSAT, may be degraded. The authors model the spatial and temporal deviations between pressure altitudes and true geometric altitudes, and the results are applied to characterize the position estimation error of the RAPSAT system. The results show that the geometric altitude deviated widely from the pressure altitude at different latitudes and altitudes, but the altitude difference remained constant at the same latitudes and altitudes. As a result, these altitude deviations can be modeled as a constant correction over the same latitudes and altitudes. These altitude deviations were observed to be reasonably stable over several days. With the adjustment of altimeter readings, the errors in the estimation of geometric altitudes, including instrumentation errors, were computed to be less than 310 ft (one standard deviation) across conterminous US. The corresponding root mean square error in aircraft position (2-D) estimated by the RAPSAT system varied from 135 ft to 297 ft for six selected locations representing the cross section of the country.<<ETX>>","PeriodicalId":141205,"journal":{"name":"9th IEEE/AIAA/NASA Conference on Digital Avionics Systems","volume":"2011 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114449562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Avionics system design for testability using a knowledge engineering approach 利用知识工程方法设计航空电子系统的可测试性
9th IEEE/AIAA/NASA Conference on Digital Avionics Systems Pub Date : 1990-10-15 DOI: 10.1109/DASC.1990.111295
J. Hallenbeck, N. Kanopoulos
{"title":"Avionics system design for testability using a knowledge engineering approach","authors":"J. Hallenbeck, N. Kanopoulos","doi":"10.1109/DASC.1990.111295","DOIUrl":"https://doi.org/10.1109/DASC.1990.111295","url":null,"abstract":"The authors present a design methodology and a knowledge-based computer-aided design (CAD) environment that allows an avionics system designer to incorporate testability into a design in a formal, verifiable way which also provides clear documentation for this activity. Prototype CAD tools have been built and have met with in-house use success. The design and implementation of the current prototype tools, collectively known as the test engineer's assistant (TEA,) tools, are presented, along with an example application. All outline of a more robust system which should provide users with a more comprehensive environment with enhanced capabilities to better meet the challenges posed by the design methodology presented is given. In addition, the impact of using testability design tool's to potentially reduce life cycle costs is discussed.<<ETX>>","PeriodicalId":141205,"journal":{"name":"9th IEEE/AIAA/NASA Conference on Digital Avionics Systems","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122111033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Situational awareness in the commercial aircraft cockpit: a cognitive perspective 商用飞机驾驶舱的态势感知:认知视角
9th IEEE/AIAA/NASA Conference on Digital Avionics Systems Pub Date : 1990-10-15 DOI: 10.1109/DASC.1990.111342
M. Adams, R. Pew
{"title":"Situational awareness in the commercial aircraft cockpit: a cognitive perspective","authors":"M. Adams, R. Pew","doi":"10.1109/DASC.1990.111342","DOIUrl":"https://doi.org/10.1109/DASC.1990.111342","url":null,"abstract":"A cognitive theory is presented that has relevance for the definition and assessment of situational awareness in the cockpit. The theory asserts that maintenance of situation awareness is a constructive process that demands mental resources in competition with ongoing task performance. Implications of this perspective for assessing and improving situational awareness are discussed. It is concluded that the goal of inserting advanced technology into any system is that it results in an increase in the effectiveness, timeliness, and safety with which the system's activities can be accomplished. The inherent difficulties of the multitask situation are very often compounded by the introduction of automation. To maximize situational awareness, the dynamics and capabilities of such technologies must be designed with thorough respect for the dynamics and capabilities of human information-processing.<<ETX>>","PeriodicalId":141205,"journal":{"name":"9th IEEE/AIAA/NASA Conference on Digital Avionics Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126503121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
Ada tool to framework interface for avionics integrated project support environments Ada工具到航空电子集成项目支持环境的框架接口
9th IEEE/AIAA/NASA Conference on Digital Avionics Systems Pub Date : 1990-10-15 DOI: 10.1109/DASC.1990.111354
W.C. Colket
{"title":"Ada tool to framework interface for avionics integrated project support environments","authors":"W.C. Colket","doi":"10.1109/DASC.1990.111354","DOIUrl":"https://doi.org/10.1109/DASC.1990.111354","url":null,"abstract":"It is pointed out that integrated project support environments (IPSEs) will be critical to the acquisition of future avionics systems. IPSEs provide an environment in which tools can work effectively together to support avionics system projects for the total software development life-cycle. The main strength of IPSEs includes interoperability and the portability of tools, databases, and personnel from one environment to another. This results in higher-quality avionics systems, on schedule and within cost, CAIS-A and PCTE+, two major IPSE interface standards, are being converged into a single interface standard. This standard, called the portable common interface set, (PCIS), is intended to be the backbone of future DoD IPSEs for the development of avionics systems. The motivation behind interface technology as it pertains to the development of avionics software is addressed. Some of the technical issues associated with the convergence of the CAIS-A and PCTE+ specifications to produce the PCIS are discussed.<<ETX>>","PeriodicalId":141205,"journal":{"name":"9th IEEE/AIAA/NASA Conference on Digital Avionics Systems","volume":"435 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126110182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A hierarchical approach to system-level diagnostics (avionics) 系统级诊断的分层方法(航空电子)
9th IEEE/AIAA/NASA Conference on Digital Avionics Systems Pub Date : 1990-10-15 DOI: 10.1109/DASC.1990.111294
W. Simpson, J. Sheppard
{"title":"A hierarchical approach to system-level diagnostics (avionics)","authors":"W. Simpson, J. Sheppard","doi":"10.1109/DASC.1990.111294","DOIUrl":"https://doi.org/10.1109/DASC.1990.111294","url":null,"abstract":"A hierarchical approach to system-level diagnosis has been developed which sets aside the detailed physical knowledge of the system and analyzes the information flow through the system using information theory and dependency modeling. Diagnostic tests are considered information sources, and possible failures are considered conclusions. Tests are chosen from the model for evaluation on the basis of the amount of information they provide. Test results are then combined in a data fusion algorithm so that diagnostic conclusions may be drawn. This hierarchical approach can be applied to any level of system complexity. The techniques used in the hierarchical approach are embodied in the ARINC Research System Testability and Maintenance Program (STAMP), and have been applied to a large number of complex systems with outstanding results. System-level testability and fault isolation are discussed, and the successful uses of the STAMP analysis approach are summarized.<<ETX>>","PeriodicalId":141205,"journal":{"name":"9th IEEE/AIAA/NASA Conference on Digital Avionics Systems","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127128921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Digital map integration in advanced tactical cockpits 先进战术座舱的数字地图集成
9th IEEE/AIAA/NASA Conference on Digital Avionics Systems Pub Date : 1990-10-15 DOI: 10.1109/DASC.1990.111363
R. Farmer
{"title":"Digital map integration in advanced tactical cockpits","authors":"R. Farmer","doi":"10.1109/DASC.1990.111363","DOIUrl":"https://doi.org/10.1109/DASC.1990.111363","url":null,"abstract":"A research project to define requirements for integrating a digital map in advanced cockpits for the year 2000 and beyond. The issues being addressed in this project include map size and scale requirements, display sizing and compatibility, map data storage requirements, embedded compression processors, databus traffic, processor workload, and map utility. During 1990, work has progressed in defining operational requirements, identifying the storage/image-quality/display size tradeoffs, and developing a technique for enhancing the pilot vehicle interface.<<ETX>>","PeriodicalId":141205,"journal":{"name":"9th IEEE/AIAA/NASA Conference on Digital Avionics Systems","volume":"83 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122316522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
An integrated approach to system design, reliability, and diagnosis 系统设计、可靠性和诊断的综合方法
9th IEEE/AIAA/NASA Conference on Digital Avionics Systems Pub Date : 1990-10-15 DOI: 10.1109/DASC.1990.111336
F. A. Patterson-Hine, D. Iverson
{"title":"An integrated approach to system design, reliability, and diagnosis","authors":"F. A. Patterson-Hine, D. Iverson","doi":"10.1109/DASC.1990.111336","DOIUrl":"https://doi.org/10.1109/DASC.1990.111336","url":null,"abstract":"Two tools for engineering analyses of highly reliable systems, one for quantitative reliability evaluation and the other for fault diagnosis, have been developed based on an object-oriented representation of fault trees. The fault trees serves as a central knowledge base for the integrated tool set, ensuring that consistent design information is used in both procedures. The tools have a graphical interface for data entry and the display of results, and enable the engineer to modify system models easily and understand the effects of the changes quickly. The availability of the models in an accessible form improves the design process by eliminating redundant model development in various stages of the lifecycle. The object-oriented models are particularly useful since they are easily modified to characterize various aspects of system behavior, promoting the development of additional analysis tools that will access the same knowledge base. The proposed approach is illustrated with reference to a representative subset of the Space Station Freedom data management system, which consists of three subsystems connected by a token ring network.<<ETX>>","PeriodicalId":141205,"journal":{"name":"9th IEEE/AIAA/NASA Conference on Digital Avionics Systems","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128229124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Domain analysis: a systems approach to software reuse 领域分析:软件重用的系统方法
9th IEEE/AIAA/NASA Conference on Digital Avionics Systems Pub Date : 1990-10-15 DOI: 10.1109/DASC.1990.111290
E. Comer
{"title":"Domain analysis: a systems approach to software reuse","authors":"E. Comer","doi":"10.1109/DASC.1990.111290","DOIUrl":"https://doi.org/10.1109/DASC.1990.111290","url":null,"abstract":"A process for a systems approach to domain analysis that forms the foundation for a reuse-directed developments process is presented. A domain analysis is the systems engineering of a family of systems in an application domain. The end goal of a domain analysis is to build and maintain a reuse library asset which can be used to develop instances of systems in the domain family. A three-phase approach is recommended for performing the domain analysis: model the domain, architect the domain, and develop software components. All products of the domain analysis activities are reusable in future system developments in the family, and also in the analysis of related domains. It is concluded that domain analysis, when done right, is a significant undertaking. It does, however, produces a significant benefit.<<ETX>>","PeriodicalId":141205,"journal":{"name":"9th IEEE/AIAA/NASA Conference on Digital Avionics Systems","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126993528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
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